From: Lukas Krickl <lukas@krickl.dev>
Date: Thu, 26 Feb 2026 06:41:09 +0000 (+0100)
Subject: input: Added basic struct for input handling
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=3fea103d12a03da2958d8fddef4398db4ea610e8;p=lrts%2F.git

input: Added basic struct for input handling
---

diff --git a/STYLE.md b/STYLE.md
index 7f1a27a..98926a3 100644
--- a/STYLE.md
+++ b/STYLE.md
@@ -14,9 +14,15 @@ Files and all functions therein are prefixed with one of the following:
 - `s_`: server side code
 - `u_`: system utility code
 - `p_`: platform module directory
+- `i_`: input handling
 - `t_`: test case
 
 
+## Goto
+
+Goto is allowed for error handling or breaking out of nested loops. 
+e.g. `goto error` or `goto loop_done`.
+
 ## Library functions
 
 Third party functions (even the C stdlib) should be wrapped at all times.
diff --git a/src/i_input.c b/src/i_input.c
new file mode 100644
index 0000000..24d0ecd
--- /dev/null
+++ b/src/i_input.c
@@ -0,0 +1,7 @@
+#include "i_input.h"
+
+struct i_cursor i_cursor;
+struct i_keyboard i_keyboard;
+
+void i_input_init(void) {
+}
diff --git a/src/i_input.h b/src/i_input.h
new file mode 100644
index 0000000..c2a53be
--- /dev/null
+++ b/src/i_input.h
@@ -0,0 +1,48 @@
+#ifndef I_INPUT_H__
+#define I_INPUT_H__
+
+/**
+ * This module is used for user input
+ * state management.
+ * The structs in this module should not be used
+ * directly to interact with gemplay. They should instead
+ * be translated to action commands. 
+ */
+
+#define I_CURSOR_BUTTONS 3
+#define I_KEYBOARD_KEYS 128
+
+enum i_button_state {
+	I_BUTTON_RELEASE = 0,
+	I_BUTTON_JUST_PRESSED = 1,
+	I_BUTTON_HELD = 2
+};
+
+
+/* describes the current cursor state */
+struct i_cursor {
+	struct u_vec2 pos;
+
+	enum i_button_state buttons[I_CURSOR_BUTTONS];
+};
+
+struct i_keyboard {
+	enum i_button_state shift;
+	enum i_button_state ctrl;
+	enum i_button_state alt;
+	enum i_button_state super;
+	enum i_button_state enter;
+	enum i_button_state space;
+	enum i_button_state backspace;
+
+	/* ascii table for all other keys */
+	enum i_button_state keys[I_KEYBOARD_KEYS];
+};
+
+/* primary IO devices */
+extern struct i_cursor i_cursor;
+extern struct i_keyboard i_keyboard;
+
+void i_input_init(void);
+
+#endif
diff --git a/src/lrts.c b/src/lrts.c
index ded1e9f..f43239f 100644
--- a/src/lrts.c
+++ b/src/lrts.c
@@ -3,6 +3,7 @@
 #include "p_platform.h"
 #include "r_render.h"
 #include "r_assets.h"
+#include "i_input.h"
 
 struct lrts_config lrts_global_cfg;
 
@@ -64,6 +65,7 @@ struct u_vec2 lrts_get_screen_res(void) {
 void lrts_init(void) {
 	/* init the fallback tile mask */
 	r_asset_init_fallback_tile();
+	i_input_init();
 }
 
 int lrts_main(int argc, char **argv) {
diff --git a/src/lrts_impl.h b/src/lrts_impl.h
index a74fbf4..0e7f219 100644
--- a/src/lrts_impl.h
+++ b/src/lrts_impl.h
@@ -48,6 +48,7 @@
 #include "r_render.c"
 #include "r_color.c"
 #include "r_assets.c"
+#include "i_input.c"
 
 #endif